Replacing The Rear Ps/2 Connectors And Serial Port Assembly - Lenovo ThinkCentre M93z 10AC User Manual

• You might have to gently twist the heat sink and fan assembly for GPU to free it from the
microprocessor.
• Do not touch the thermal grease while handling the heat sink and fan assembly for GPU.
8. Position the new heat sink and fan assembly for GPU on the system board so that the four screws are
aligned with the corresponding holes in the system board.
9. Follow the following sequence to install the four screws to secure the heat sink and fan assembly for
GPU, as shown in Figure 39 "Removing the heat sink and fan assembly for GPU" on page 69.
a. Partially tighten screw
b. Partially tighten screw
10. Connect the GPU fan cable to the system board. See "Locating parts on the system board" on page 16.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to "Completing the parts replacement" on page 75.

Replacing the rear PS/2 connectors and serial port assembly

Attention:
Do not open your computer or attempt any repair before reading and understanding "Important safety information"
on page v.
This section provides instructions on how to replace the rear PS/2 connectors and serial port assembly.
Note: The rear PS/2 connectors and serial port assembly is available only in some models.
To replace the rear PS/2 connectors and serial port assembly, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See "Removing the computer cover" on page 46.
4. Locate the rear PS/2 connectors and serial port assembly. See "Locating components" on page 15.
5. Remove the rear I/O assembly and disconnect the cables of the rear PS/2 connectors and serial port
assembly from the system board. See "Removing and reinstalling the rear I/O assembly" on page 48.
70
ThinkCentre M93z User Guide
1 , then fully tighten screw
3
, then fully tighten screw
2 , and then fully tighten screw
4
, and then fully tighten screw
1 .
3
.